The '''Austrian National Library''' (, abbreviated '''ÖNB''') is the largest library in Austria
, with 7.4 million items in its various collections. The library is located in the Hofburg Palace
. Since 2005, some of the collections have been relocated within the baroque
structure of the Palais Mollard-Clary
. Founded by the House of Habsburg|Habsburg
s, the library was originally called the '''Hof-Bibliothek''' ("Imperial Library"); the change to the current name occurred in 1920.
["NB online – The National Library – History" (overview), Österreichische Nationalbibliothek, 2006, ONB.ac.at webpage: [http://www.onb.ac.at/ev/about/history/history_text.htm ONB-Lib-History].]
The library complex includes four museums, as well as multiple special collections and archives.